<template>
    <el-container class="homeContainer">
        <!--头部区域-->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <el-container>
            <!--侧边栏-->
            <el-aside :width="iscollapse?'64px':'200px'">
                <!--侧边菜单-->
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu
                        background-color="#313743"
                        text-color="#fff"
                        active-text-color="#4e9eec"
                        unique-opened
                        :collapse="iscollapse"
                        :collapse-transition="false"
                        :router="true"
                        :default-active="activePath"
                >
                    <!--一级菜单-->
                    <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                        <template slot="title">
                            <i :class="iconsObj[item.id]"></i>
                            <span>{{ item.authName }}</span>
                        </template>
                        <!--二级菜单-->
                        <el-menu-item :index="'/'+subitem.path" v-for="subitem in item.children" :key="subitem.id"  @click="saveNavState('/'+subitem.path)">
                            <template slot="title">
                                <i class="el-icon-menu"></i>
                                <span>{{ subitem.authName }}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!--内容区域-->
            <el-main>
                <!--路由占位符-->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
    export default {
        data(){
            return {
                menulist:[],
                iconsObj:{
                    '125':'iconfont icon-users',
                    '103':'iconfont icon-tijikongjian',
                    '101':'iconfont icon-shangpin' ,
                    '102':'iconfont icon-danju',
                    '145':'iconfont icon-baobiao'
                },
                iscollapse: false,
                activePath:''
            }
        },
        created(){
            this.getMenuList()
            this.activePath = window.sessionStorage.getItem('activePath');
        },

        name: "home",
        methods:{
            //退出
            logout(){
                window.sessionStorage.clear();
                this.$router.push('/login');
            },
            //请求菜单
            async getMenuList(){
                const {data:res} = await this.$http.get('menus')
                if(res.meta.status != 200) return this.$message.error(res.meta.msg)
                this.menulist = res.data
            },
            //折叠展开侧边菜单栏
            toggleCollapse(){
                this.iscollapse = !this.iscollapse;
            },
            //保存菜单栏的选择状态
            saveNavState(activePath){
                window.sessionStorage.setItem('activePath',activePath);
                this.activePath = activePath
            }
        }
    }
</script>

<style lang="less" scoped>
    .homeContainer{
             height: 100%;
         }
    .el-header {
        display: flex;
        justify-content: space-between;
        padding: 0;
        align-content: center;
        background-color: #373d41;
        color: #ffffff;
        font-size: 20px;
        >div {
            display: flex;
            align-items: center;
            span {
                margin-left: 15px;
            }
        }
    }
    .el-aside {
        background-color: #333744;
        .el-menu {
            border-right: none;
        }
    }
    .el-main {
        background-color: #e9edf0;
    }
    .iconfont {
        margin-right: 15px;
    }
    .toggle-button {
        background-color: #485162;
        font-size: 10px;
        line-height: 24px;
        color: #ffffff;
        text-align: center;
        letter-spacing: .2em;
        cursor: pointer;
    }
</style>
